Fact Directory

Why are some green screens blue?

A blue screen is often used over a green screen when filming darker scenes or when working with subj... Read more

What and Where Is Zion?

Zion originally referred to a hill in Jerusalem, where King David captured a Jebusite fortress and r... Read more

Does grass grow at night?

Grass does grow at night, although the rate and nature of this growth can vary. During the day, ... Read more

Here's a look at the top five most-produced firearms : Kalashnikov (AK-47)The AK-47 family is ... Read more

Tunnel Boring Machines (TBMs) are often buried and abandoned at the end of a tunnel project due to p... Read more

How large is the Amazon Rainforest?

The size of the Amazon rainforest varies depending on the definition used. It generally covers betwe... Read more

Cats are drawn to people who give them space because they value independence and control. Overly aff... Read more

What Are Orientation Flights for Bees?

Orientation flights are practice flights young bees take to learn the location of their hive. These ... Read more

How tall is the highest mountain?

Mount Everest, located in Nepal and Tibet, is usually said to be the highest mountain on Earth. Reac... Read more

Why Do Data Centres Use So Much Water?

Data centres consume large amounts of water for cooling, mainly through evaporative cooling. This me... Read more